• Microcontroller PIC18F87J50 with USB V2.0 Full Speed 12 Mb / s, clock frequency 48 MHz
  128KB of Flash, 3,904 bytes of RAM
  USB HID Bootloader
  USB Mini-B Connector
  Dual ATCBus Host Socket
  Source back up online.
  Boost Converter with output current up to 2A.
  ICSP Header
  2 led, 2 push button, 1 reset button
  2 x 12 I / O Header.
  Power supply for the circuit:
             + 5VDC from USB mini Connector, Terminal Connector.
             + 3.7V from Li-Po battery.
  Built-in rechargeable battery.
  LED display status is charging.
  LED display low battery status.
  Dimensions: 72.5 x 83 mm
  Design library support for Altium, Eagle, Orcad.
  Code sample support.

       1. Introduction of PIC Easy R2

    PIC Easy R2 is a product which was designed and manufactured by AT-COM giving users the convenience combine ATCBus with PIC18FJ Microchip microcontrollers series. The board supports to connect the computer via USB Full Speed V2.0, with a USB HID Bootloader that allows users to load firmware directly into the PIC microcontroller without any other programming kit. In addition, the PIC18F87J50 microcontroller with 48MHz processor speed combined with the Dual ATCBus Host Socket design maximizes the microcontroller's resources to meet the needs of programmers developing applications. Especially with convenient data output, PIC Easy R2 will bring you the most modern and sophisticated design inspiration.

    2. Design Diagram of PIC Easy R2 

    3. Features of PIC Easy R2

•  Power supplies for PIC Easy R2 are available through the following connectors:

        - 5VDC via USB mini connector (6).

         - 5VDC via Terminal Connector (8).

         - 3.7V Li-Po battery through Connector (11).   

• The outstanding feature of the PIC Easy R2 is its built-in backup online, which can switch between the 5VDC power source and the battery for mobility and stable operation in the event of a power failure.
• This feature is based on the TPS61092 IC Boost Converter with the input voltage of 1.8 - 5.5V and the output current that meets the application need current up to 2A.

• Battery for the board is Lithium - Polymer 3.7V rechargeable battery and recharged from 5VDC power via MCP73832T charging IC with 4.2V charging voltage and 100mA charging current, fully automatic charging mode to maximize the longevity of Battery.
• The charger also has a function is charging battery status indicator through Charging LED Indicator(10), while charging the Led light is red when the battery is fully charged, Led off.
• Low battery indicator function is also integrated is displayed through Low Battery LED Indicator (12). When the voltage of the battery drops below 3.3V, the Led light is red.
• The board is integrated ON / OFF switch, the user can set the switch to ON or OFF to open or shut down the power for the circuit. In addition, users can connect to the external switch via External ON / OFF Switch (4).

• PIC Easy R2 is equipped with powerful PIC18F87J50 microcontroller with USB V2.0 Full Speed 12 Mb/s, clock frequency up to 48 MHz, 128KB Flash memory, 3,904 bytes RAM combined with Dual ATCBus Host Socket optimized peripheral of microcontroller allows PIC Easy R2 to easily combine multiple ATCBus boards to perform applications such as GSM, GPRS, GPS, etc.

• The board is equipped with a reset button, two blue LEDs, two push buttons, all located at the bottom of the board:

          - The reset button is used to reset the PIC18F87J50 microcontroller, when the reset button is pressed, the voltage at the MCLR pin of PIC18F87J50 changes from logic 1 to logic 0.

          - 2 blue Led visual indicators or in case users need to debug code when programming. 2 Led connected to PIC18F4550 via RE0 and RE1 pins, positive when the output of RE0, RE1 at logic level 1.

          - When the push button action changes the pins RB4, RB5 of the PIC from logic 1 to logic 0. 

• The board is designed with 2 headers with the I/O of PIC18F87J50 placed along the 2 sides of PIC Easy R2.

• Dual ATCBus Host Socket with pins Analog, SPI, I2C, Timer, PWM, UART, ... according to ATCBus standard helps users connect to the Easy Board to experience the "Plug and Play" feature of PIC Easy R2.

 

 

• After running USB Bootloader V2.9j, select Import Firmware Image and select the path to the .hex file store.

 

• After successfully importing file.hex, select Erase/Program/Verify Device to load the file.hex to Program Memory of PIC18F87J50.

 

• After successfully loading the file.hex you can choose Reset Device to enable the PIC18F87J50 to run the program you have programmed.